Pneumatic tire tread and buttress



FIG. 1 is a left side perspective view of a pneumatic tire tread and buttress showing our new design it being understood that the pattern is repeated uniformly throughout the circumference of the tread and buttress;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is an enlarged fragmentary front elevational view thereof.

The broken line showing of environmental structure in FIGS. 1, 2, 4 and 5 of the drawing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a pneumatic tire tread and buttress, as shown and described. 